thanks for joining us. see you tomorrow here on cnn. >> -- every tear from their eyes, and death shall be no more. neither shall there be mourning, nor crying, nor pain anymore, for the former things have passed away. ♪ ♪ >>> when you beat somebody in the ring, you're not just beating them up or something. you're, like, beating the entire symbolism of them. you're beating who they are. >>> marlen esparza's early mornings always start with math. how much to eat. how far to run. how many pounds, sprints, crunches. how many endless hours of training will it take to win? why are you here every day? >> because i want to win. this is my life and this is what i do, like, and i can honestly say, like, this is who i am. like, right here, you're with it. you see it. this is what i do. >> marlen is the five-time national boxing champion. >> morning. >> good morning. >> she only interrupts her training to work at this houston dental office with her mother, carmen. >> i've seen her come in and she's all, like, just